Transcript 3. Bladder Carcinoma

Bladder Carcinoma
By
Dr. Abdelaty Shawky
Assistant professor of pathology
Bladder Carcinoma
* Definition: malignant tumor arising from the
epithelial lining of the urinary bladder.
• (N.B normal epithelial lining of urinary
bladder is transitional epithelium but it can
change to squamous epithelium or columnar
type under the effect of continuous irritation
by inflammation, or stone formation)
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Transitional epithelium (urothelium)
lining the normal urinary Bladder.
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* Epidemiology of Bladder Carcinoma:
• Cancer bladder is more common in males
than females.
• The male to female ratio for transitional cell
tumors is approximately 3:1.
• About 80% of patients are between the
ages of 50 and 80 years.
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* Risk Factors for Bladder Cancer:
1. Cigarette smoking: is clearly the most important
factor, increasing the risk three fold to seven fold,
depending on the pack-years and smoking habits. 50% to
80% of all bladder cancers among men are associated with
the use of cigarettes, cigars and pipes.
2. Industrial exposure to naphthylamine as present
in aniline dye used in rubber industries. The cancers appear
156 to 40 years after the first exposure.
3. Schistosoma haematobium: infections in areas
where these are endemic (Egypt, Sudan) are an
established risk. The ova are deposited in the
bladder wall and incite a brisk chronic inflammatory
response that induces progressive mucosal
squamous metaplasia and dysplasia. Seventy per
cent of the cancers are squamous cell carcinoma.
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4. Long-term use of analgesics.
5. Heavy long-term exposure to
cyclophosphamide, an immunosuppressive agent,
induces, as noted, hemorrhagic cystitis and
increases the risk of bladder cancer.
6. Prior exposure of the bladder to radiation: often
performed for other pelvic malignancies, increases
the risk of urothelial carcinoma. In this setting,
bladder cancer occurs many years after the
radiation.
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7. Bladder stones: cause chronic irritation to the
mucosa, so increase the risk for squamous cell
carcinoma.
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*Histologic types of bladder carcinoma:
1. Transitional cell carcinoma.
– TCC in situ.
– Papillary (superficial) TCC carcinoma.
– Invasive TCC .
2. Squamous cell carcinoma:
- On top of squamous metaplasia.
3. Adenocarcinoma.
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Papillary carcinoma
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Fungating carcinoma of UB
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Papillary TCC
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Papillary TCC
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Papillary TCC
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Invasive TCC
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Squamous metaplasia of bladder epithelium
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Squamous cell carcinoma showing keratinized
nests of squamous epithelium
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Adenocarcinoma: tumor cells form glands with
malignant criteria , and deeply infiltrating
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* Clinical Manifestations of Bladder CA
1. Hematuria (80-90%): Generally painless and may be gross
or microscopic hematuria.
2. Pain: often reflects tumor location
– Lower abdominal pain – Bladder mass
– Rectal discomfort & perineal pain – Invasion of prostate or
pelvis.
– Flank pain - Obstruction of ureters
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3. Other urinary Symptoms:
– Frequency, urgency, nocturia due to irritation of the
mucosa or due to decrease bladder capacity.
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* Investigations for Bladder Cancer:
1. Urinary Cytology: to detect any desquamated
malignant cells.
2. Cystoscopy: regardless of cytology results.
3. TURB (Transurethral resection of bladder
tumor) for all visible tumors to determine
histology & depth of invasion
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4. Imaging:
A. Ultrasonography
B. CT, or MRI - Can determine the extent of tumor
spread (e.g. into perivsesical fat, prostate or
vagina, LNs)
C. CT chest / abdomen, MRI, radionuclide imaging of
skeleton to assess for distant metastasis.
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* Grading of transitional cell carcinoma:
1. Low grade TCC:
- The tumor cells are less pleomorphic, slightly
similar to the cell of origin, few mitosis, so have
better prognosis.
2. High grade TCC:
- The cells highly pleomorphic, have more
mitosis.
- worse prognosis because it have aggressive
behavior, more infiltrative
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* TNM staging for bladder carcinoma:
• T: is tumor size.
• N: express lymph node affection by the tumor so:
- N0 no affection to lymph nodes.
- N+ the lymph nodes are infiltrated by the tumor
• M: express distant metastasis so:
- M0
- M+
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no distant metastasis.
there is distant metastasis.
T: Tumor size.
• pT 0: carcinoma in situ.
• pT I: the tumor infiltrates the lamina propria.
• pT II: the tumor infiltrates the musculosa
propria.
• pT3: the tumor infiltrates perivesical fat.
• pT4: distant spread.
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* Complications of urinary bladder carcinoma:
1. Fistula formation: fistula is an abnormal channel that
connects the urinary bladder with another structure
within the abdomen.
2. Bleeding: hematuria and anemia.
3. Obstruction: specially if the tumor grow near the
urethral openings of the bladder lead to obstructive
uropathy in the form of hydroureter, hydronephrosis
4. Stone formation: secondary to the obstruction and
infection.
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5. Spread either by :
a. Direct spread to surrounding structures
b. Hematogenous spread to distant organs.
c. Lymphatic spread.
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Treatment & Prognosis of Bladder
carcinoma
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I. Superficial non-muscle invasive TCC:
• Requires at least complete endoscopic resection +/intravesical therapy using Bacillus Calmette-Guérin (BCG)
vaccine which act through stimulation of the immune
system in such a way that the immune system begins to
target and destroy any remaining cancer cells.
• Of good prognosis.
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II. Muscle-Invasive TCC:
• Generally radical cystectomy & pelvic
lymphadenectomy.
• Of bad prognosis.
– Removal of bladder & pelvic LNs.
– + Removal of prostate, seminal vesicles, & proximal
urethra in males. Generally  impotence.
– + Removal of urethra, uterus, fallopian tubes, ovaries,
anterior vaginal wall, & surrounding fascia in females.
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Thanks
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